Clutch-operating means



Feb. 9 1926.

. P. BURKE CLUTCH OPERATING MEANS Filed April' 28 1924 3 Sheets-Sheet 1INVENTOR.- v w @m an; yaw.

Feb. 9 1926.

1924 3 Sheets -$heet 2 v INVENTOR. M 65% M9 enp F. BURKE CLUTCHOPERATING MEANS v 1 kn Filed 28 ATTORNEYS Feb. 9 192s. 1,572,223 I P.EURKE I CLUTCH OPERATING MEANS Filed A ri128 1924 3Sheets-Sheet5 JZINVENTOR.

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ATTORNEYS ill immmmm-u.

PAUSE EURKE. 4311i GREEN Eiifil', 'WIECUNSIEL'fifiSIGNQR 'I'Q NORTHWESTENGINEERING COMPAI' J'Y, GE.

a! 1%..(if23', WXZWGNSHIP', A. CORYORATION OF WISCONSIN.

(I .icplieaiion can m ni 2%, Serial Ho. renew.

To (ZZZ whom B. it. knm n that i 3 bonus, a citizen of the United Statesof iiimerica. and rcsidcni of Green Bay, in the county of Brown andState of Wisconsin. have invented new uni useiui lfm'proven'ienis inluich-Qpcraiinq "ii icons, of which the fol lowing is a description,reference being bad to rho accoi'i'ipanying drawings. which are a partof ibis specification.

The invention rcialies i'o chuchcpci'aiing mechanism.

in many forms 4 clutches o; be on f mechanism ijhere are h in oeriainapof muscu- :,u man ca eble oi Thus. in some forms pm'iicuiariy hoistingami excumming hos railer common przaccice to use min. or air c iers forthe periormance of these opezeiiohs, rhe'operator s muscuiar eL'i'ortsthen being reduced. in the light duty of opening; and. ciosing asuitable valve which in turn conirois the ingress to and egress from thecyiincier of the steam or air.

The use of fiuid-pressure-operated means has certain objections amongwhich may be mentioned [the relativmy high cost, a certain lack ofreliability cine to the possibility of freezing in cold weather, and;the trouble of mainiemince incicient to the complica- ,tion of the fluidcontrol, particularly in such cases where a compressor is used as themeans for supplying "the piessurc fluid.

A further obgeciion iZO ihe use of fluid control in many of its forms isthe fact that it is cliiiiculi or impossibie for the opevaior toaccurateiy controi the degree of effort, for the reason that in manyforms of fluid control there is little or no relation between .theposition of the operaiors lever or pedal, or the intensity ofinuscuiaicfi'ori applied to it, and the position oi: the eievice movedby the fluid contro or the intensiiy with which such device isaciuaieil.

It is the object of this invention i supply a incchanicai means for theaiicquaie reduction of muscular ciiort for many i nlilli of machineoperation and To do so with a minimum oi cost and mechanicalCOEE'RPllCHilQH.

it; is a further object of this inventionv to an the a .4, without unduefam ne. of machin ry,

insure tiiaiz the intensity of the effective offort delivered by themachinery will be in proportion to the intensity of the muscular effortapplied.

iii. further object of the invention is to provideciutch mechanism ofthe type above specified, with a positive release for the main and servoclutch mechanisms.

The invention further consists in the several features hereinafter setforth and more particularly conclusion hereof.

in the drawings: 1 is an end view of the clutch-operating mechanismembodying the invention, the some being taken on the section line 1--1of Fig. 9.;

Fig. 53 is a. composite sectional View taken on the iine 2 9. of Fig. 1;

Fig. 3 is e. detail plan view of part of the mechanism shown in Fig. 1;

Fig. 4: is on end view of a modified form of mechanism embodying theinvention, the same being taken on the line 4-4 of Fig. 5;

Fig. 5 is a composite sectional view taken on. the line 5-5 of Fig. 4;

Fig. 6 is a detail plan view of'part of the mechanism shown in Fig. 4;

Fig. 7 is a detail plan view of aliy operable shifting mechanism;

Fig. 8 is an end view of another form of mechanism embodying theinvention, looking from the line 88 of Fig. 9;

Fig. 9 is an elevation view of mechanism shown in Fig. 8, parts beingbroken away and parts being shown in section;

Fig. 10 is a detail plan view of the mechclefined by claims at the themanuanism viewed from an angle of forty-five degrees from the verticaland looking toward the right of Fig. 8, that is, along the hue 10-10 ofFig. 8. I

Referring to Figs. 1 to 3, inclusive, I have here shown a drum 11, suchas is used on various kinds of machineryv for ropes, chains or cables,loose on a power-driven shoii; 12 mounted in suitable supporting"earings 13, only one being shown.

The drum 11 is adapted to be driven from the shaft 12 (hroughanysuitable form of clutch and l have here shown a clutch of thecontracting: band type. including a spider or support 14 keyed to 1110shaft 12 and carrying a clutch member or band 15, one end 16 And 'mounted on the spider, and the otherend ill 18 of which is also carriedby the spider in a manner hereinafter described. The band is engagedwith a cylindrical peripheral clutch surface 19 of thedrum 11 byapplying tension to the end 18 thereof, causing a contraction and hencea gripping of said band to the drum to establish a frictional drivingengagement therewith.

to the support flil is a friction member of drum 20 which is concentricwith the shaft 12 and is adapted to be engaged by a friction band 21,one of whose ends 22 is operetively connected to the end 18 of the band15 through a bell crank lever 23 having its supporting pin 24: pivotallymounted on the spider or support 14-. in any suitable manner. The end 22of the band 21 is connected to a pin 25 on. the longer arm of the bellcrank lever 23, while the end-180i the hand 15 is connected by a pin 26to the borter arm of said lever 23. The other end of the band 21 isoperutively conecicdto a rocker lever 28, as by a T-bolt 9 connectedwith the looped and of the band and having ail-adjustable threadedconnection with an anchor pin 80 pivotally iiaounted in a bearing 31 atone end of the lev r hive-r 28 is pivotally mounted inter- 3e its endsupon a pin 32 carried by lugs on the support 1e, and at its other end.has curved or cam-like surfaces 34 udaptedto engage the ends of a slot35 in a shifter-rod 333 which is slidably mounted in a central bore 37in the shaft 12 and adapted to be shifted axially by the operator," theshaft- 12 having a slot 38 therein to accommodate the movement of, thelever 28. While the machine is running shaft 12 rotates continuously andwhen it is desired to drivingly connect the drum 11 therewith theoperator shifts therod- 3G outwardly, thereby causing the upper end ofthe lever 28 to swing upwardly and exert a tension on the end 27 of theband, which brings the band 2 1 into frictional contact with the drum20, there being relative movement between said drum and hand because atthat time the band 21 is rotating with the shaft 12 and the drum 20 isstationary.

in accordance with the well-known law which defines the relation betweenthe ten- I sions in the ends of a friction band having relative motionwith its drum, a tension in the end 22 of the band will be producedwhich is substantially greater than that applied at the end 27. In otherwords, the

force of applying the band imparted by the operntor is increased by theforce transmitted to the band from the shaft 12 through the relativemovement of said band end druid, and consequently a greater force isapplied by the band to the lever I 23 by its connection at its end 22with said lever, and this greater force is utilized to shaft 12, itbeing further noted that the ratioof the arms of the bell crank 23 alsoincreasesthe force holding the band 15 against the clutch surface 19over the force applied by the end of the band 22. Thus, a small forceapplied by the operator is milltiphed through the mechanism abovedescribed to bring a much greater force to bear on the clutch so as tomove said clutch into engagement with the drum or device to be driven,as it will be understood that the drum is only representative of adevice or mechanism to be driven from the shaft 12.

- When the shaft 36 is shifted inwardly the tension of the band 21 willbe released and in many instances such release is sufiioient todisengage the clutch, but a positive release is preferred, and-for thispurpose I have shown a lever 39 pivotally mounted intermediate its endsone pin 40 carried by the support 1 1 and having a forked portion 41 atone end eugageahle with pins 42 formed on or secured to the anchor pin30, and hav: ing its other end connected by a pin 43 to a. rod 4 1 whichextends through an arm 45 keyed to 'the bell crank lever pin 24, saidrod 424' having-nuts 46 on its outer end act.- ing as adjustable stopsto engage the arm 45 on 8 d wnward movement of the lever 28 to aid seposition through the inward shifting ofithe shaft 36, this engagement ofrod 44 with'the arm 45 causing the bell crank lever to swing away fromthe shaft 12- and hence release the band 15 from the clutch surface 19,at the same timcthe downward swinging movement of the lever 28 causingto those previously described, but instead.

of having the servo friction band 21 engage wi h a stationary drum saidband co'acts with a drum 20 formed as a part of the drum 11 which isotherwise similar to the drum 11 and similarly mounted on the shaft 12.The lever 28 for this construction has i s position reversed so as toproperly opcratc the land 21 which is now disposed ill ill)

Within the color flange of "the olrum, and because of this reversedposition of the lever 38 the inward movemeub of the sbi foing shaft 36by the operator eels to drew the bond ill into engagement with the drum'20, uml the tension exerted. by the ope eioi on llis beml, iogethei'with the iorque. "sees-- eel upon it by the oli'urn 20 oi: reliv i vemotion between said bend and drum. causes e greater tension to beexerted at iis Qllil upon the lever which illilfiupon moves the'olutcliband 15 into driving engagement Witliille (ileum 11. The same mechanismas shown in the fiISi-(l6SC1il)Q(l eonstvuction is used to obtain apositive 2Eelouse of the clutch, and iis servo mechanism enclthe nui'i shove been similarly desigsuoh' release asking; "place on tbe'out- Word.movement of blue shifting shaft 36, as such movement causes as downwardswing of ihe inner end of the lever 28 and hence e downward release ofreel of lever to release the bzuul 15.

Tie eons-"infliction shown in Figs. 8 to 10., nclusive, op'eetes in.lube suniie way as libel. shown in Figs. i 6, inclusive, but with anincreased mechanical advent; 'tlirougg'b the modified arrangement oi"the servo mocha uiein. In this construction the power-driven slm'ii:so, which it will be understood is sup-- poieel in suitable bearings,lies the device lo be sctuatecl, such as the drum 51., loosely mountedthereon, saiel (liuin having pe-- riplierel clutch surface or surfaces Aservo friction bond 53 and a clutch band are operatively connectedtogether and carried on a spider or support 55 keyed to the shaft 50.Shoe end 56 of the bend 53 is connected by a pin 57 to one end of alever 58 and the other end, having a lug 59, is connected by a. pin 59to an end of a lever 60. The lever 58 has its pin 61 pivotoily mountedin the support 55 end its arms straddling said support and is pivoiob lyconnected at its otherenel by a pin 62 lo one encl of a link 63. The.other end of Sillil link is pivoielly conuected bye pin 64 to one emu ofa bell crank lever lllcvllllifiil on o goivoi pin 66 carriecl by thesupport 535. Ti lie oil'ier erm of saicl bell crank lever lies ils endsWorking in a slot 6? in the spider and in a slot 67 the shell, 50, 1116iprom-fled with oenmlilxe su feces es engage- .eble with the ends of aslot so in e. sliifiing 55% 5'1? sliclebly mounted in an axial bore l.the shaft- 50 anal under iilie control of bile operator, wherebyshifting soiol shaft 2'0 inwardly will, through the connections abovedescribed, pu'l; tension on. the end 56 oi the baud and bring it intooperative ongugement with the surface of the drum. thereby causing agreater force so be epplico to the lever 60.

The lever is pivolally mountezi as its upper one. on a pin '32 ce 'friedby iluz supmul :1, swing 130% m and is connected interu'icdiuie its endsby a pin 7?, to. the end 74 of the band The other end T5 of the band isdeadeu led on the support 55 by connection with a pin 76 com-ledthereby.

ll iili. this construction, with the shaft 50 continuously iotetiilgg inthe direction of the arrow, when. the band 53 is brought into frictionaleugagemeni; with the clutch sun- ?ece 52 by the operator. as previously(lo scribed. the relative motion between the 1:0- tetiny; bend and thedrum causes a tension to be produeeci in the band which is trans--mitiecl as :1 foice to swing the free end oi the lever 30 ton owl theleft, thereby pulling the end We of the band 5 toward the left andbringing: said band into driving ongugement with the drum. As the end 7ioil the band 54- is mounted between the pin 72 end the end 59 of theband. 53. an increased leverage will result. The u'iovemeuf. of theshifting member 70, bvtlic operator; in the opposite direction causes arelease of the bend uml swinging of the lever (30 'lmvuid lbe rightcauses a release ofbuud 54 from izbe (Eli-um.

in. all oi the cousix'ucisious above described, ii- Will be mueelillill; the shifting: member retells will time DO'WQZ -(lI'lVPDSlllllii. and. in Figs. 2.. 5 and l" 1 show a collar "Z? loosely mountedon the rocl 3G anal having projecting pins '78 engaged by the forks 79of :1 bell crank 80 which is pivotully supported on u reluiivclystationary support and is zulsrplezl to be connected in u wcll-kuoxvu 06manner to a lever o1. pedal (not shown) udepiecl to be moved to and froby the 01% motor. This same means may be used \Vllll the shaft '30 shownin Fig. 9.

it will mso-be noted that each of the bumls is movicle'l with :1suitable friction liuiuo;

From the foregoing (losci'ipi'ion it, will be noted. that by theoperation of ihe operator of the servo friction baud mechanism the powerof ihe driving shaft is used to .uugment ube force applied by theoperator to opei'oie the main clutch mechunism. and (but the inlensi'tyof the force applied to operate the main clutch mechanism will be inproportion to the force applied by the operate: 11 in og'iei'uiinu theservo mecliunisn'i. since the to sum prozlucml by the servo frictionclutch is auguiei'iliod in propoztion to the tension 1n-oduoed on Sillilclutch by the operator. Thus, a force which the operator can readilyapply to the servo fi-ictiopl clutch mechanism. without undue strain; isaugmented by the driving force of the meeliine to perform the heavyrluty of opei'utii-ig the main clutch mechanism.

il liile l have n'ientiouml Elle manual operutiou of'tlie servon'ieclmnis il)y the operator; it will. be understood tbeni I (loom uuymechanism. which will perform the light duty imposed upon the opening!as an equiv 139 under the control of the operator and operalivelyconnected to said main clutch mechanism and to said shaft for operatingsaid main clutch mechanism through the force applied in making anapplication augmented by the power which it receives from said shaft,and means associated with both of said clutch mechanisms for positivelyreleasing the same.

2. In a machine, the combination witha power-driven shaft and a memberto be driven, off a main friction clutch mechanism for drivinglyconnecting said member with said shaft, a servo friction clutchmechanism under the control of the operator and operatively connected tosaid main clutch mechanism and to said shaft for operating said" mainclutch mechanism through the force applied in making an applicationaugmei'ited by the power which it. receives from said shaft, and meansoperable on the release of said servo clutch mechanism for positivelyreleasing the main clutch mechanism.

3. In a machine, the combination with a power-driven shaft and a. memberto be driven, of a main clutch band normally and positively revolvingwith said shaft for dri v ingly connecting said member with said shaft,a servo clutch band normally and positively. revolving with saifi shaftand opei'atively connected thereto a d to said main clutch band, saidmember provided with; frictional surfaces for engagement of said hands,and manually operated means for directly applying the servo band to saidmember.

4. In a machine, the combination with a power-driven shaft and a memberto be driven, of a main friction, clutch mechanism including a frictionband for drivingly connee-ting said member with said shaft, a servofriction clutch band under the direct control of the operator, a supportfor both clutch hands positively revolving wit said shaft, means,actuated by the operator, for directly effecting the tensioning of saidservo clutch band, and means including a lever mounted on said supportfor transmitting the tension set up in said servo clutch band to saidmain clutch band to apply the latter.

in a machine. the combination with a power-driven sh t and a member tobe bands of said clutch mechanisms together driven, of a main frictionclutch mechanism including a friction band for drivingly con- 'nectingsaid member with said shaft, a servo friction clutch band under thedirect control of the operator, a. support for both clutch bandspositively revolving with. said shaft, means, actuated by the operator,for directly effecting the t'ensioiiing of said servo clutch band, andmeans including a lever mounted on said support for transmitting thetension set up in said servo clutch band to said main clutch band and ofa type to increase the force applied to the main clutch band over theforce said lever receives from said servo band.

6. In a machine, the combinationwith a power-driven shaft and a memberto be. driven, of a main friction clu tch inecha-. nism having anengaging part for drivingly connecting "said member with said shaft, aservo friction clutch mechanism having an engaging part underthe controlof the operator, a support for the engaging parts of, both clutchmechanisms revolving witlhsaid shaft, manually operated means for.associating the engaging part of the seRvo clutch mechanism with saidmember to receive power from said shaft. means including a lever fortransmitting the power from the servo clutch mechanism to the. engagingpart of the main clutch mechanism to apply the latter. and releasemechanism opera (in the release of the engaging part of the servo clutchmechanism for moving saidv ltl'VPl'lO positively release the engagingpart l mechanism for drivingly connecting said member with said shaft. aservo frictionband type clutch mechanism, means including a lever'foroperatiwelyconnecting the \VlIGIEbYtGEHSlCIl in the band of the servoclutch mechanism from power derived through said shaft is exerted uponsaid lever to apply the hand of said main clutch mechanism, the bands ofboth clutch mechanisms being mounted to normally and positively revolvewith said shaft, and manually operated means for making adirectapplication of the servo clutch mechanism.

8. In a machine. the combination with a 'iower-driven shaft and a memberto be driven, of a main friction-band type clutch mechanism fordrivingly connecting said member with said shaft, a servo frictionbnndtype of clutch mechanism, means including' a lever for cpe'rativelyconnecting the bands of said clutch mechanisms to gether whereby tensionin the .band of the' 'servo clutch mechanism from power dememesmechanism, the bands at bcth ciutci'i' mechanisms being mounted toncrmeiiy and pcsir tiveiy revolve with said shaft, msinnniiy eperatedmeans including a, lever i'evoii'ing with said shaft and cennectecl tothe iisnci of the servo ciuteh mechanism end e shiftabie memberpoeitiveiy Tevciving with said shait and ccnticiied by the operator nmiconcentrically tiisncswi with resnectic eeii'i shaft.

9. in it machine, the ccnibinstieij witii it powezwiiiven sinitt, 0t amember: to be driven having cc'exiai frictional cititcii sui'-- fecesthereon, ct clutch iDflHQiSfiOKi'fltiiY mini pesitiveiy icevoiving withsaid sinift anti en gegeaiiie with said surfaces, manually epmm fordirectly sppiying nne 0t sew. cintcii minds to its ciutcii snififsce,and taecticn between saiti iastsmmeii bemi" E' i other band for me /imp;snici etiien time intc engagement with its clutch suctace- 10. in ainnciiinc the cciniiitisticn with n. power-driven shaft, cii smeniiieito tie driven having ccexiai fr'icticnni cintcii sur- -:'ncesthe-seen ct cintch bends remiving with said. 291135793 and engegesbiewith'ssiii surfaces msnuniiy operated ineens tel moving cm of said.clutch bends iii-ta engagement with its ciutch surface, a connectionbetween said test-named, band and the other canii for moving said etherband into engagement with its ciutciisu'risce. nnci means for positivelyreleasing saicibnnds from engagement with their cintch surfaces 11. Ina, machine, the combination with a power-driven shaft and a, member tobe driven, of e, main friciion ciutch mechanism for (iirivingiyconnecting said; member with said shaft a servo fiicti'cn ciutchYflQC'iliifiiSiIL e, connectien between said clutch mecimtcisms iieicnythe hatter 011 crates the foe-incl. cperatocconti'oiieii means forappiying' and releasing said servo ciutch mechanism, and a connectionbetween said first-named connection and said operatorccnti-ciieci meansfer effecting a" positive ireieese cit the main cintch mechanism.

1%. in n machine the ccmbinsticn with a shaft and a membei' to betiriven, of s main friction clutch mechanism for cctmnecting said.member to said shaft in'cinziing a fricticnimnci, s seicvo fricticn.ciutcii mechanism inciuding s frictionbin-mi messes including it level.opeist-ivciy ccnncctingz ssiti iizincis whereby the latter operates thetea-nice, control means actuated by the c-pemtur {or applying andreleasing erm fricticnimnci, and means c0nneat. w nizi ci'mtrci meanswith said lever to eieci: 2;. positive release of the frictioniiend e?the main cintch mechanism,

15th in ev machine the combination with n pcnwmii'iven shaft an a memberto be (iiiifil't at a main friction clutch mechw nisin Sim:ii'ifiiiiggijl ccnnectins: said meanbev with shaft; it serve frictioncintcii mecininism, 1i connection between said ciiitch mechanismswhereby the iattei? 0pece tes the ici'ineic, operator-controlled meemfci n'pi'iiying end reieesing said servo ci'utc ii mechanism, and meansessociatc; with said opet'atci ccnticiieci means anti actuated therebyte positivciy release the main cintcii mechanism. u

14. in s ".neciiine tile cmniiinnticn with n pmveciiriven siia it and.at member iic be driven, cf it main ii'icticn c iutch mecixw nisminciuriingz a fricticmbend for drivingiy ('c-nnevting said member withS.ii(i shaft,

a servo fiictimi clutch mechanism inciucb.

mg a ii-iction'bami, means cperativeiy connectingsaiii mantis wherebythe iettcr cpcrates the farmer, operator-controiled means for appiyinand i'eieiising the band of said servo clutch niecimnisni, and meanszisscciated with said opeintcr-ccnti'oiieii means and actuated therebyto pesitiveiy release the band iii the llliiifibiliifiis mechanism intestinn'my 'xiiiei'eci, 1i siiirc my .g'nw time.

PAUL ii Uiiii'i iii).

